Travelers have found it’s best to book a flight 49 days in advance to save up to 54% compared to booking the same week of travel. As your travel date approaches, the cost of this flight route may potentially increase. While opting to book 49 days out may not be an option for all, there are still additional ways to secure a deal in the near future. You might find a flight from Illinois to Ontario 1-2 weeks in advance for as low as $277, or $498 for flights within the next 24 hours.
Due to multiple factors, expect to potentially pay more when booking in June. For low rates, January can be a great choice for travel to Ontario. Flights to Ontario from Illinois in January are about $296 on average during January, but can be found for as low as $90.
Regardless of the time of day you decide to fly, the ticket price will remain around the same. Book flights from Illinois to Ontario as you normally would.
Fly from
Fly to
Budget
$76 - $287
Route
Depart
Return
Price
Lambert-St LouisOntario
STL - ONT
STLONT
Lambert-St Louis
Wed 5/15
1 stop5h 55m
Ontario
Fri 5/17
1 stop6h 26m
Lambert-St LouisOntario
STL - ONT
STLONT
Lambert-St Louis
Sat 4/20
1 stop5h 55m
Ontario
Fri 4/26
1 stop6h 52m
Chicago MidwayOntario
MDW - ONT
MDWONT
Chicago Midway
Sat 4/27
1 stop11h 02m
Ontario
Sat 5/4
1 stop11h 13m
Lambert-St LouisOntario
STL - ONT
STLONT
Lambert-St Louis
Wed 4/24
1 stop12h 22m
Ontario
Wed 5/1
1 stop9h 29m
Chicago MidwayOntario
MDW - ONT
MDWONT
Chicago Midway
Tue 4/30
1 stop10h 00m
Ontario
Tue 4/30
1 stop10h 47m
Chicago MidwayOntario
MDW - ONT
MDWONT
Chicago Midway
Thu 5/16
1 stop27h 37m
Ontario
Wed 5/22
1 stop28h 52m
Chicago MidwayOntario
MDW - ONT
MDWONT
Chicago Midway
Sat 4/27
1 stop10h 04m
Ontario
Fri 5/3
1 stop17h 44m
Chicago O'Hare IntlOntario
ORD - ONT
ORDONT
Chicago O'Hare Intl
Sat 4/27
1 stop7h 32m
Ontario
Sat 5/4
2 stops10h 33m
Moline Quad-CityOntario
MLI - ONT
MLIONT
Moline Quad-City
Sat 4/27
1 stop7h 22m
Ontario
Tue 4/30
1 stop8h 07m
No data available for this route at this time. Please check back soon.
Overall
Entertainment
Boarding
Food
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Comfort
Reviews
I would have liked flying out of the airport I chose not a different airport. My flight was moved to San Jose
Overall
Entertainment
Boarding
Food
Crew
Comfort
Reviews
I would have liked flying out of the airport I chose not a different airport. My flight was moved to San Jose
Overall
Entertainment
Boarding
Food
Crew
Comfort
Reviews
I would have liked flying out of the airport I chose not a different airport. My flight was moved to San Jose
Overall
Entertainment
Boarding
Food
Crew
Comfort
Reviews
I would have liked flying out of the airport I chose not a different airport. My flight was moved to San Jose
Overall
Entertainment
Boarding
Food
Crew
Comfort
Reviews
I would have liked flying out of the airport I chose not a different airport. My flight was moved to San Jose
Overall
Entertainment
Boarding
Food
Crew
Comfort
Reviews
I would have liked flying out of the airport I chose not a different airport. My flight was moved to San Jose
0%of flight departures | Early morningMidnight to 6 am |
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100%of flight departures | Morning6 am to noon |
0%of flight departures | AfternoonNoon to 6 pm |
0%of flight departures | Evening6 pm to midnight |
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